import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int year=scan.nextInt();
        if(year%100==0)
        {
            if(year%400==0){
                System.out.println(year+"是闰年");
            }
            else {
                System.out.println(year+"不是闰年");
            }
        }
        else{
            if(year%4==0){
                System.out.println(year+"是闰年");
            }
            else {
                System.out.println(year+"不是闰年");
            }
        }
    }
}